Q82 / 90 · JEE Main 2024 (27 Jan Shift 2) · Physics

The primary side of a transformer is connected to 230 V, 50 Hz supply. The turn ratio of primary to secondary winding is 10 : 1. Load resistance connected to the secondary side is 46 Ω. The power consumed in it is:

  • A
    12.5 W
  • B
    10.0 W
  • Correct answer
    C
    11.5 W
  • D
    12.0 W

Solution

The voltages associated with the primary and the secondary side of the transformer are related to the turn ratio as follows:

V1 V2=N1 N2   ...1

From equation (1), it follows that

230V2=101

V2=23 V

Hence, the power consumed can be calculated as follows

P=V22R=23×2346=11.5 W 

Hence, the correct answer is option: 'C'.

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